AVR Libc Library Reference
boot_spm_busy_wait()
boot_spm_interrupt_enable()
boot_spm_interrupt_disable()
boot_is_spm_interrupt()
boot_rww_busy()
boot_spm_busy()
boot_lock_fuse_bits_get(address)
boot_signature_byte_get(addr)
boot_page_fill(address, data)
boot_page_erase(address)
boot_page_write(address)
boot_rww_enable()
boot_lock_bits_set(lock_bits)
boot_page_fill_safe(address, data)
boot_page_erase_safe(address)
boot_page_write_safe(address)
boot_rww_enable_safe()
boot_lock_bits_set_safe(lock_bits)
Wait while the SPM instruction is busy.